Fix: replaceStyle make style name undefined

edit/edit.js

@@ -325,13 +325,11 @@ function onRuntimeMessage(request) {
           request.reason !== 'editPreview' &&
           request.reason !== 'editSave' &&
           request.reason !== 'config') {
-        // code-less style from notifyAllTabs
-        const {sections, id} = request.style;
-        ((sections && sections[0] || {}).code === null
-          ? API.getStyle(id)
-          : Promise.resolve([request.style])
-        ).then(([style]) => {
-          editor.replaceStyle(style, request.codeIsUpdated);
+        Promise.resolve(request.codeIsUpdated === false ?
+          request.style : API.getStyle(request.style.id)
+        )
+          .then(newStyle => {
+            editor.replaceStyle(newStyle, request.codeIsUpdated);
           });
       }
       break;

edit/sections-editor.js

@@ -942,7 +942,7 @@ function createSectionsEditor(style) {
   function replaceStyle(newStyle, codeIsUpdated) {
     // FIXME: avoid recreating all editors?
     reinit().then(() => {
-      style = newStyle;
+      Object.assign(style, newStyle);
       updateHeader();
       dirty.clear();
       // Go from new style URL to edit style URL

edit/source-editor.js

@@ -216,7 +216,7 @@ function createSourceEditor(style) {
         history.replaceState({}, '', `?id=${newStyle.id}`);
       }
       sessionStorage.justEditedStyleId = newStyle.id;
-      style = newStyle;
+      Object.assign(style, newStyle);
       $('#preview-label').classList.remove('hidden');
       updateMeta();
       livePreview.show(Boolean(style.id));